AutoCodes – Mazda – P1742 Mazda

P1742 Mazda Code - Torque Converter Clutch Solenoid Failed On Conditions

Quick Answer

With the engine running in gear at cruise speed and the Powertrain Control Module (PCM) receives a signal that the Torque Converter Clutch (TCC) failed ON. Common causes include Faulty Torque Converter Clutch Solenoid, Torque Converter Clutch Solenoid harness is open or shorted, Torque Converter Clutch Solenoid circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1742 Mazda indicates Torque Converter Clutch Solenoid Failed On Conditions.
Common causes: Common causes include Faulty Torque Converter Clutch Solenoid, Torque Converter Clutch Solenoid harness is open or shorted, Torque Converter Clutch Solenoid circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,912

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1742 Mazda Description

With the engine running in gear at cruise speed and the Powertrain Control Module (PCM) receives a signal that the Torque Converter Clutch (TCC) failed ON.

OBDII Code P1742 Mazda - Torque Converter Clutch Solenoid Failed On Conditions - AutoCodes.com — P1742 Mazda Code - Torque Converter Clutch Solenoid Failed On Conditions

What does this mean?

What are the Possible Causes of the DTC P1742 Mazda?

Faulty Torque Converter Clutch Solenoid
Torque Converter Clutch Solenoid harness is open or shorted
Torque Converter Clutch Solenoid circuit poor electrical connection

How to Fix the DTC P1742 Mazda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1742 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1742 Mazda code?

Need more information on how to fix the P1742 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1742 Mazda code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1742 Mazda Code

1. What does the OBDII code P1742 mean on a Mazda?

P1742 indicates that the Torque Converter Clutch (TCC) solenoid has failed on conditions, meaning the solenoid is not functioning as intended to control the torque converter lock-up.

2. What are the common symptoms of P1742 in a Mazda?

Symptoms may include poor fuel efficiency, transmission overheating, difficulty shifting gears, engine stalling at low speeds, or the transmission failing to lock up properly.

3. What causes the P1742 code to appear in a Mazda?

Common causes include a faulty TCC solenoid, transmission fluid that is dirty or low, damaged wiring or connectors in the transmission system, or internal transmission issues.

4. Can driving with a P1742 code damage my Mazda's transmission?

Yes, ignoring this code can lead to further transmission damage, overheating, and reduced fuel efficiency, so itâ€™s important to address it promptly.

5. How do you fix the P1742 code on a Mazda?

Repairs may involve replacing the TCC solenoid, flushing and refilling the transmission fluid, repairing damaged wiring or connectors, or, in severe cases, rebuilding the transmission.

6. How much does it cost to fix a P1742 code on a Mazda?

The cost can range from $150 to $500 for solenoid replacement, while more extensive repairs like a transmission rebuild can cost significantly more, depending on the vehicle and labor rates.

7. Can low transmission fluid cause a P1742 code?

Yes, low or dirty transmission fluid can affect the torque converter clutch solenoid's operation and trigger the P1742 code.

8. Can you clear the P1742 code without fixing the problem?

Clearing the code without resolving the underlying issue may temporarily turn off the check engine light, but the problem will likely reoccur and could worsen over time.

9. Is the P1742 code specific to Mazdas?

No, while P1742 is common in Mazda vehicles, it can also appear in other vehicles with automatic transmissions when there's an issue with the TCC solenoid.

10. How can you diagnose the P1742 code on a Mazda?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the TCC solenoid, checking for damaged wiring or connectors, and evaluating the condition and level of the transmission fluid.